scholarly journals Graphene Quantum Dots as Flourishing Nanomaterials for Bio-Imaging, Therapy Development, and Micro-Supercapacitors

Micromachines ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 866
Author(s):  
Merve Kortel ◽  
Bhargav D. Mansuriya ◽  
Nicole Vargas Santana ◽  
Zeynep Altintas
Keyword(s):  
Quantum Dots ◽  
Structural Properties ◽  
Edge Effects ◽  
Quantum Confinement ◽  
Review Paper ◽  
Graphene Quantum Dots ◽  
Heteroatom Doping ◽  
Size Dependent ◽  
Bio Imaging ◽  
Therapy Development

Graphene quantum dots (GQDs) are considerably a new member of the carbon family and shine amongst other members, thanks to their superior electrochemical, optical, and structural properties as well as biocompatibility features that enable us to engage them in various bioengineering purposes. Especially, the quantum confinement and edge effects are giving GQDs their tremendous character, while their heteroatom doping attributes enable us to specifically and meritoriously tune their prospective characteristics for innumerable operations. Considering the substantial role offered by GQDs in the area of biomedicine and nanoscience, through this review paper, we primarily focus on their applications in bio-imaging, micro-supercapacitors, as well as in therapy development. The size-dependent aspects, functionalization, and particular utilization of the GQDs are discussed in detail with respect to their distinct nano-bio-technological applications.

Graphene Quantum Dots in Electrochemical Sensors/Biosensors

2019 ◽  
Vol 15 (2) ◽  
pp. 103-123 ◽  
Author(s):  
Farnoush Faridbod ◽  
Afsaneh L. Sanati
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Electrochemical Properties ◽  
Edge Effects ◽  
Quantum Confinement ◽  
Electrochemical Sensors ◽  
Graphene Quantum Dots ◽  
Graphene Oxides ◽  
Reduced Graphene ◽  
Fluorescent Nanomaterials

Background: Graphene and its derivatives, as most promising carbonic nanomaterials have been widely used in design and making electrochemical sensors and biosensors. Graphene quantum dots are one of the members of this family which have been mostly known as fluorescent nanomaterials and found extensive applications due to their remarkable optical properties. Quantum confinement and edge effects in their structures also cause extraordinary electrochemical properties. Objective: Recently, graphene quantum dots besides graphene oxides and reduced graphene oxides have been applied for modification of the electrodes too and exposed notable effects in electrochemical responses. Here, we are going to consider these significant effects through reviewing some of the recent published works.

scholarly journals Organic dots (O-dots) for theranostic applications: preparation and surface engineering

RSC Advances ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 2253-2291
Author(s):  
Amin Shiralizadeh Dezfuli ◽  
Elmira Kohan ◽  
Sepand Tehrani Fateh ◽  
Neda Alimirzaei ◽  
Hamidreza Arzaghi ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Photodynamic Therapy ◽  
Photothermal Therapy ◽  
Biomedical Applications ◽  
Surface Engineering ◽  
Graphene Quantum Dots ◽  
Carbon Quantum Dots ◽  
Cargo Delivery ◽  
Bio Imaging ◽  
Theranostic Applications

Organic dots is a term used to represent materials including graphene quantum dots and carbon quantum dots because they rely on the presence of other atoms (O, H, and N) for their photoluminescence or fluorescence properties. Cargo delivery, bio-imaging, photodynamic therapy and photothermal therapy are major biomedical applications of organic dots.

Facile and simultaneous synthesis of graphene quantum dots and reduced graphene oxide for bio-imaging and supercapacitor applications

2016 ◽  
Vol 40 (11) ◽  
pp. 9111-9124 ◽  
Author(s):  
A. Muthurasu ◽  
P. Dhandapani ◽  
V. Ganesh
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Graphene Quantum Dots ◽  
Reduced Graphene ◽  
Bio Imaging ◽  
Simultaneous Synthesis ◽  
Supercapacitor Applications

A simple and facile method for the simultaneous preparation of graphene quantum dots (GQDs) having different emission colours, viz., yellow, green and blue, and reduced graphene oxide (RGO) utilized respectively for bio-imaging and supercapacitor applications is demonstrated.

Nanomolar Level Detection of Metal Ions by Improving the Monodispersity and Stability of Nitrogen-Doped Graphene Quantum Dots

2021 ◽  
Author(s):  
Neeraj Sohal ◽  
Simran Kaur Bhatia ◽  
Soumen Basu ◽  
Banibrata Maity
Keyword(s):  
Quantum Dots ◽  
Metal Ions ◽  
Fluorescent Sensor ◽  
Graphene Quantum Dots ◽  
Intrinsic Properties ◽  
Heteroatom Doping ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Heteroatom doping of graphene quantum dots (GQDs) leads to modify their intrinsic properties and used as a fluorescent sensor for the metal ions sensing. Here, Nitrogen-doped GQDs (N-GQDs) was synthesized...

Size-Dependent Antibacterial Behavior of Graphene Quantum Dots

2013 ◽  
Author(s):  
Siheng Su ◽  
Carla B. Shelton ◽  
Jingjing Qiu
Keyword(s):  
Quantum Dots ◽  
Surface Chemistry ◽  
Graphene Quantum Dots ◽  
Gel Filtration ◽  
Filtration Method ◽  
E Coli ◽  
Size Dependent ◽  
Mtt Method ◽  
Diphenyltetrazolium Bromide ◽  
Standard Plate

In this study, the antibacterial behavior of differing sized graphene quantum dots (GQDs) was studied. The gram negative bacteria, Escherichia coli (E. coli), were used as the bacteria mode. Different sized GQDs with tunable fluorescent colors were acquired by a gel-filtration method. The size, surface chemistry, and photoluminescence properties of GQDs were characterized, respectively. The viability of GQDs treated bacteria was determined by the standard plate counting method. Moreover, the reactive oxidative species (ROS) level was detected by the 3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide (MTT) method. The integrality of the bacteria membrane was observed under the scanning electron microscopy (SEM). The experimental results indicated that GQDs demonstrated size-dependent and surface chemistry-dependent antibacterial behaviors. This research provided insightful guidelines in the selection of suitable GQDs for their potential bioapplications.

Metal chalcogenide quantum dots: biotechnological synthesis and applications

RSC Advances ◽  
2016 ◽  
Vol 6 (47) ◽  
pp. 41477-41495 ◽  
Author(s):  
J. Mal ◽  
Y. V. Nancharaiah ◽  
E. D. van Hullebusch ◽  
P. N. L. Lens
Keyword(s):  
Quantum Dots ◽  
Quantum Confinement ◽  
Metal Sulfide ◽  
Metal Chalcogenide ◽  
Size Dependent

Metal chalcogenide (metal sulfide, selenide and telluride) quantum dots (QDs) have attracted considerable attention due to their quantum confinement and size-dependent photoemission characteristics.

Size-Dependent Structural and Optical Characteristics of Glucose-Derived Graphene Quantum Dots

2013 ◽  
Vol 30 (6) ◽  
pp. 523-531 ◽  
Author(s):  
Libin Tang ◽  
Rongbin Ji ◽  
Xueming Li ◽  
Kar Seng Teng ◽  
Shu Ping Lau
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Optical Characteristics ◽  
Size Dependent
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